I could veg you could veg she could veg we could veg you could veg they could veg
V-ing form
I could be vegging you could be vegging she could be vegging we could be vegging you could be vegging they could be vegging
Perfect
I could have vegged you could have vegged she could have vegged we could have vegged you could have vegged they could have vegged
V-ing perfect
I could have been vegging you could have been vegging she could have been vegging we could have been vegging you could have been vegging they could have been vegging
Negation
Simple form
I couldn't veg you couldn't veg she couldn't veg we couldn't veg you couldn't veg they couldn't veg
V-ing form
I couldn't be vegging you couldn't be vegging she couldn't be vegging we couldn't be vegging you couldn't be vegging they couldn't be vegging
Perfect
I couldn't have vegged you couldn't have vegged she couldn't have vegged we couldn't have vegged you couldn't have vegged they couldn't have vegged
V-ing perfect
I couldn't have been vegging you couldn't have been vegging she couldn't have been vegging we couldn't have been vegging you couldn't have been vegging they couldn't have been vegging
Interrogative form
Simple form
could I veg? could you veg? could she veg? could we veg? could you veg? could they veg?
V-ing form
could I be vegging? could you be vegging? could she be vegging? could we be vegging? could you be vegging? could they be vegging?
Perfect
could I have vegged? could you have vegged? could she have vegged? could we have vegged? could you have vegged? could they have vegged?
V-ing perfect
could I have been vegging? could you have been vegging? could she have been vegging? could we have been vegging? could you have been vegging? could they have been vegging?
Interro-negative form
Simple form
couldn't I veg? couldn't you veg? couldn't she veg? couldn't we veg? couldn't you veg? couldn't they veg?
V-ing form
couldn't I be vegging? couldn't you be vegging? couldn't she be vegging? couldn't we be vegging? couldn't you be vegging? couldn't they be vegging?
Perfect
couldn't I have vegged? couldn't you have vegged? couldn't she have vegged? couldn't we have vegged? couldn't you have vegged? couldn't they have vegged?
V-ing perfect
couldn't I have been vegging? couldn't you have been vegging? couldn't she have been vegging? couldn't we have been vegging? couldn't you have been vegging? couldn't they have been vegging?